Heat Pipe Performance Parameters   For JR or SLR Series with Heat Pipes Heat conduction coefficient >99% Axial heat transition quantity 0.93-2.49 KW/cm2 Heat conduction speed 200 mm/s Axial temperature difference 1-2 °C/m Starting temperature 20°C Starting speed 2 minutes Working temperature range 30°C - 300°C Lifetime >10 years

For all series with glass tubes   Value Absorbance of selective coating a>0.931 Hemisphere Emittance e<0.06 Solar Radiance Exposure using the Sun H<2.639 MJ/m2 Stagnation parameter using air Y>240 m2°C/KW average heat loss coefficient ULT<0.78 W/m2°C Outer diameter/ Inner Diameter, tube 1 58 mm / 47 mm Tube length 1.5 m